TW201344272A - Optical receptacle and optical module comprising same - Google Patents

Abstract

To provide an optical receptacle and an optical module comprising same, with which it is possible to appropriately and inexpensively implement an optical transmission with a monitor such that light of a light-emitting element is extracted in a direction along a substrate in an optical transmission body. In a linkage light total reflection face (14) and either a first monitor light total reflection face (15) or a second monitor light total reflection face (17), light of a light emitting element (7) which enters into a first face (2a (11)) is split into a linkage light and a monitor light using a total reflection. The linkage light is discharged from a third face (2c (12)) toward an optical transmission body (5), and the monitor light is discharged from a first face (2a (13)) toward a photoreceptor element (8).

Description

Optical socket and optical module having the same

The present invention relates to an optical receptacle and an optical module having the same, and more particularly to an optical receptacle suitable for optically coupling a light-emitting component and an optical transmission body, and an optical module having the same.

In optical communication using optical fibers, a light module having a light-emitting element such as a surface-emitting laser (for example, a VCSEL: Vertical Cavity Surface Emitting Laser) is used.

In such an optical module, there is a light module component called an optical socket, which couples light including communication information emitted from the light-emitting element to an end face of the optical fiber, thereby being used for transmitting Optical fiber transmission.

Further, in the conventional optical module, for the purpose of stabilizing the temperature change or adjusting the light output by the output characteristics of the light-emitting element, the light (intensity or amount of light) for monitoring from the light-emitting element is completed. Various proposals.

For example, in Patent Document 1 and Patent Document 2, there is proposed a technique in which a photoelectric conversion device including a light-emitting element and a light-receiving element for monitoring in a package called TO-CAN is used to emit light from the light-emitting element. One of the emitted light is directed toward the monitor light in the glass window of the package Reflected by the light receiving element side.

However, when such a CAN package type photoelectric conversion device is driven at a high frequency, crosstalk may occur due to leakage of electromagnetic waves from a portion of the wiring connected to the light emitting element, and in such a case, It is difficult to respond to high-speed communication of 10 Gbps or more. Further, in the case of the CAN package, for example, in the case of the so-called TO-46 CAN, the maximum diameter of the optical receptacle is 6 mm to 7 mm, which is difficult to miniaturize.

On the other hand, in the substrate-mounted photoelectric conversion device in which the light-emitting elements are mounted on the circuit board, there is no problem of crosstalk such as the CAN package type, and there is an advantage that the number of parts, cost, and size can be reduced. However, on the other hand, since there is no glass window, it is difficult to provide a function of causing the photoelectric conversion device side to generate monitor light.

Therefore, as described in Patent Document 3, for example, a technique is proposed in which a part of the light emitted from the light-emitting element is used as the monitor light on the optical receptacle side in order to correspond to the substrate-mounted photoelectric conversion device. A reflective surface that is reflected toward the light-receiving element side, thereby achieving stable high-speed communication with monitoring.

(previous technical literature)

(Patent Literature)

Patent Document 1: Japanese Laid-Open Patent Publication No. 2000-340877

Patent Document 2: Japanese Laid-Open Patent Publication No. 2004-221420

Patent Document 3: Japanese Laid-Open Patent Publication No. 2008-151894

In the invention described in the above-mentioned Patent Document 3, after the light of the light-emitting element penetrates the optical receptacle, the end face of the optical fiber can be taken out in a direction perpendicular to the substrate of the photoelectric conversion device.

However, in the case of using the optical module, it is required to take out the light of the light-emitting element in the direction in which the end face of the optical fiber faces the substrate, and in such a case, in order to appropriately perform the light transmission accompanying the monitoring, However, it is required to have a new method different from the invention described in Patent Document 3 in which the direction of extraction of nature and light is different.

Therefore, the present invention has been developed in view of such a problem, and an object thereof is to provide an optical receptacle and an optical module having the same, which can be implemented appropriately and at low cost, such as toward a slanting substrate in an optical transmission body. In the direction, the light accompanying the monitoring of the light of the light-emitting element is taken out.

In order to achieve the foregoing object, the optical receptacle of claim 1 of the present invention is characterized in that the light-emitting element and the optical transmission body can be optically coupled in a state of being disposed between the photoelectric conversion device and the optical transmission body. In the photoelectric conversion device, the light-emitting element and the light-receiving element are mounted on a substrate, and the light-receiving element receives monitoring light for monitoring light emitted from the light-emitting element, and the optical socket includes: a surface that emits light from the light-emitting element and emits the monitor light toward the light-receiving element; and a light-coupling total reflection surface that has a predetermined first tilt angle with respect to the first surface The method is disposed on the second surface of the optical receptacle body on the opposite side of the first surface such that a part of the light incident on the light-emitting element after the first surface is incident The light is internally incident at an incident angle larger than the critical angle, and a part of the light after the internal incident is totally reflected as a coupling light to be coupled to the optical transmission body toward the optical transmission body side; the optical socket a third surface of the main body that emits the coupling light that is totally reflected by the coupled light total reflection surface toward the optical transmission body; and a first monitor light total reflection surface that is coupled to the coupling light The total reflection surface is disposed adjacent to the first surface and has a predetermined second inclination angle or the first inclination angle, and is disposed on the second surface such that the light of the light-emitting element incident on the first surface The other part of the light other than the part of the light is internally incident at an incident angle larger than the critical angle, and the other part of the light after the internal incidence is separated as the monitoring light from the coupled light. The state is totally reflected toward the third surface side in a state of being integrated with the coupling light, and the second monitor light total reflection surface is detached from the optical path of the coupling light and is opposite to the front The first surface of the first monitor light total reflection surface is positioned on the total reflection direction side of the first monitor light total reflection surface so that the first surface has a predetermined third inclination angle. The monitor light that is totally reflected by the reflection surface is internally incident at an incident angle larger than the critical angle, and the monitor light after the internal incidence is totally reflected toward the position corresponding to the light-receiving element among the first surfaces.

According to the invention of claim 1, the light of the light-emitting element incident on the first surface can be totally reflected by the total reflection surface of the coupling light and the total reflection surface of the first monitor light or the second monitor light can be totally reflected. The total reflection of the surface separates into the coupled light and the monitor light, so it can be used only by the surface of the optical socket body The light transmission accompanying the monitoring of the light taken out in the direction of the substrate along the direction of the substrate in the optical transmission body is appropriately and inexpensively realized.

Further, by setting the total reflection direction of the monitor light to the third surface side of the first monitor light total reflection surface, it is possible to reduce the size and cost of the optical receptacle body.

Further, in the request item 1, the feature point of the optical receptacle of claim 2 further includes the feature that the first monitor light total reflection surface is disposed so as to have the second inclination angle with respect to the first surface. Thereby, the monitor light is totally reflected in a state separated from the coupled light, and the coupled light total reflection surface and the first monitor light total reflection surface are coupled to an internal incident direction of the light of the light-emitting element and the coupling. The light and the total reflection direction of the monitor light are in point contact in a direction orthogonal to each other, or are arranged in line contact between the coupled light and the total reflection direction of the monitor light, and the second monitor light total reflection surface is The inner inclined surface of the concave portion recessed on the second surface is formed.

According to the invention of claim 2, the monitoring light is separated from the coupled light in the first monitor light total reflection surface, whereby the second monitor light corresponding to the design concept can be expanded. For example, the degree of freedom of the layout of the reflecting surface can be softly adjusted to reduce the amount of use of the recessed portion having the second monitor light reflecting surface to reduce the amount of use of the optical receptacle material, or to form the recessed portion to be shallow. In order to improve the mold release property and the improvement of the mechanical strength when the optical receptacle is resin-molded using a mold, etc.

In this case, the coupled light total reflection surface and the first monitor light total reflection surface By arranging in point contact with the direction perpendicular to the internal incident direction of the light of the light-emitting element and the total reflection direction of the coupling light and the monitor light, it is possible to reliably correspond to the concept that the concave portion is formed deep. On the other hand, if the coupled light total reflection surface and the first monitor light total reflection surface are arranged in line contact in the total reflection direction of the coupling light and the monitor light, the coupled light total reflection surface and the (1) The total reflection surface of the monitor light is directly connected to the surface of the stepped surface to reduce the surface area. Therefore, the concept of the mold release property can be improved by forming the recessed portion to be shallow (the multiplication effect about the mold release property can be expected). Composition.

Further, in the request item 2, the feature point of the optical receptacle of claim 3 further has a feature that the coupled light total reflection surface and the first monitor light total reflection surface are disposed to perform the point contact. The second monitor light total reflection surface is disposed closer to the first surface side than the light path of the coupling light.

According to the invention of claim 3, as described above, since the recessed portion is formed deeper, the amount of use of the optical receptacle material can be reduced, so that cost reduction can be achieved.

Furthermore, the feature point of the optical receptacle of claim 4 further includes, in the request item 2, that the second monitor light total reflection surface is disposed closer to the second surface than the optical path of the coupling light side.

According to the invention of claim 4, as described above, the concave portion is formed shallow, the mold release property can be improved, and the cost can be further improved by the improvement of the yield.

Moreover, the feature points of the optical socket of claim 5 are in claims 2 to 4. In any of the above, the first monitoring light total reflection surface and the second monitor light total reflection surface are arranged in plural.

Then, according to the invention of claim 5, it is possible to monitor the increase in the amount of light or to monitor the plurality of light-receiving elements.

Furthermore, the feature point of the optical receptacle of claim 6 further includes, in any one of claims 2 to 4, the coupling light total reflection surface and the first monitor light total reflection surface for performing the aforementioned In the line contact manner, the first monitor light total reflection surface is disposed on the total reflection direction side of the coupling light with respect to the coupling light total reflection surface.

Then, according to the invention of claim 6, it is easy to design the optical path when the concave portion is formed shallow.

Furthermore, the feature point of the optical receptacle of claim 7 further includes, in the request item 1, a feature that the first monitor light total reflection surface has the first inclination angle with respect to the first surface. The monitoring light is totally reflected in a state of being integrated with the coupling light, and the monitor light is separated from the coupled light in the second monitor light total reflection surface.

According to the invention of claim 7, the first monitor light total reflection surface and the coupling light total reflection surface can be formed in the same plane shape, so that the configuration can be simplified and the cost can be reduced.

Further, the feature point of the optical receptacle of claim 8 further includes, in any one of claims 1 to 7, a feature that the light-emitting element is disposed at a position corresponding to the light-emitting element on the first surface a first lens that is incident on the coupled light total reflection surface and the first monitor light total reflection surface a second lens surface that emits the coupling light toward the optical transmission body is disposed on the third surface, and the monitor light is emitted toward the light receiving element at a position corresponding to the light receiving element on the first surface The third lens surface.

Then, according to the invention of claim 8, the lens surface can be utilized to improve the coupling efficiency of the coupled light and the monitor light.

Further, the optical module of claim 9 is characterized in that: the optical receptacle according to any one of claims 1 to 8; and the photoelectric conversion device according to claim 1.

According to the invention of claim 9, the light of the light-emitting element incident on the first surface can be totally reflected by the total reflection surface of the coupling light, and the first monitor light total reflection surface or the second monitor light can be used. Since the reflection surface is totally reflected and separated into the coupling light and the monitor light, the light of the light-emitting element can be appropriately and cost-effectively taken out in the direction of the substrate along the direction of the substrate by the shape of the surface of the optical receptacle body. The light is sent along with the surveillance.

According to the present invention, it is possible to appropriately and inexpensively realize light transmission accompanying monitoring such as taking out light of a light-emitting element toward the substrate in the optical transmission body.

1‧‧‧Light Module

2‧‧‧Light socket (optical socket body)

2a‧‧‧ Lower end (1st side)

2b‧‧‧Upper end face (2nd side)

2c‧‧‧Right end face (3rd side)

2d‧‧‧left end

2e‧‧‧ front face

2f‧‧‧ rear end face

3‧‧‧ photoelectric conversion device

4‧‧‧Fiber Optic Installation Department

5‧‧‧Optical fiber (optical transmission body)

5a‧‧‧ end face

6‧‧‧Semiconductor substrate

7‧‧‧Lighting elements

8‧‧‧Light-receiving components

9‧‧‧ ferrules

10‧‧‧1st recess

10a‧‧‧ inside bottom

11‧‧‧1st lens surface

12‧‧‧2nd lens surface

13‧‧‧3rd lens surface

14‧‧‧Coupling light total reflection surface

15‧‧‧1st monitor light total reflection surface

16‧‧‧2nd recess

16a‧‧‧ inside

17‧‧‧2nd monitor light total reflection surface

18‧‧‧3rd recess

18a‧‧‧ inside

19‧‧‧Connector

145‧‧ ‧ 差

BL‧‧‧ boundary line

La‧‧‧Laser light

Lc‧‧‧Fiber coupled light

Lm‧‧‧ surveillance light

OA (1), OA (2), OA (3) ‧ ‧ optical axis

Fig. 1 is a schematic block diagram showing an embodiment of an optical receptacle and an optical module including the same according to the present invention.

2 is a top plan view of the optical receptacle shown in FIG. 1.

Figure 3 is a bottom plan view of the optical receptacle shown in Figure 1.

Fig. 4 is an enlarged cross-sectional view showing a first main portion of the optical receptacle shown in Fig. 1.

Fig. 5 is an enlarged plan view showing the main part of the optical receptacle shown in Fig. 1.

Fig. 6 is an enlarged cross-sectional view showing a second main portion of the optical receptacle shown in Fig. 1.

Fig. 7 is a longitudinal sectional view showing a first modification of the present invention.

Fig. 8 is an enlarged cross-sectional view showing a first main portion of a first modification.

Fig. 9 is an enlarged cross-sectional view showing a second main portion of the first modification.

Fig. 10 is a longitudinal sectional view showing a second modification of the present invention.

Figure 11 is a plan view of Figure 10.

Fig. 12 is an enlarged cross-sectional view showing the main part of a second modification.

Fig. 13 is an enlarged plan view showing a main part of a second modification.

Fig. 14 is a longitudinal sectional view showing a third modification of the present invention.

Figure 15 is a plan view of Figure 14.

Figure 16 is a bottom plan view of Figure 14.

Fig. 17 is an enlarged cross-sectional view showing a first main portion of a third modification.

Fig. 18 is an enlarged cross-sectional view showing a second main portion of a third modification.

Fig. 19 is a longitudinal sectional view showing a fourth modification of the present invention.

Fig. 20 is an enlarged cross-sectional view showing the main part of a fourth modification.

Fig. 21 is a longitudinal sectional view showing a fifth modification of the present invention.

Figure 22 is a plan view of Figure 21.

Fig. 23 is an enlarged cross-sectional view showing the main part of a fifth modification.

Fig. 24 is an enlarged plan view showing a main part of a fifth modification.

Fig. 25 is a longitudinal sectional view showing an optical module according to a sixth modification of the present invention.

Figure 26 is a schematic plan view of the optical receptacle shown in Figure 25.

Figure 27 is a bottom plan view of the optical receptacle shown in Figure 25.

Figure 28 is a right side view of the optical receptacle shown in Figure 25.

Fig. 29 is a plan view showing another modification of the present invention.

Hereinafter, an embodiment of an optical receptacle and an optical module including the same according to the present invention will be described with reference to Figs. 1 to 29 .

Fig. 1 is a schematic block diagram showing an outline of an optical module 1 of the present embodiment and a longitudinal sectional view of the optical receptacle 2 of the embodiment. 2 is a plan view of the optical receptacle 2 shown in FIG. 1. Furthermore, Fig. 3 is a bottom view of the optical receptacle 2 shown in Fig. 1.

Further, the outer shape of the optical receptacle 2 shown in Fig. 1 corresponds to the cross-sectional shape of A-A of Fig. 2 .

As shown in Fig. 1, the optical receptacle 2 (optical socket body) of the present embodiment is disposed between the photoelectric conversion device 3 and the optical fiber 5 as an optical transmission body.

Here, the photoelectric conversion device 3 of FIG. 1 is regarded as a substrate-mounted photoelectric conversion device 3. That is, as shown in FIG. 1, the photoelectric conversion device 3 has a surface (upper surface) on the side of the optical receptacle 2 in the semiconductor substrate (circuit substrate) 6 which is disposed in parallel with the lower end surface 2a of the optical receptacle 2, and has a thunder The light-emitting element 7 is directed toward one light-emitting element 7 that emits (lights) in a vertical direction (upward direction) with respect to the surface, and the light-emitting element 7 constitutes the aforementioned VCSEL (Vertical Resonator Surface Illumination Laser). Further, the photoelectric conversion device 3 is provided on the surface of the semiconductor substrate 6 on the side of the optical receptacle 2 and on the right side in FIG. 1 facing the light-emitting element 7, and has received laser light for receiving the laser light emitted from the light-emitting element 7. A light-receiving element 8 of the monitor light Lm (for example, intensity or amount of light) is output. The light receiving element 8 can also be a photo detector.

Further, although not shown, the intensity of the monitor light Lm received by the light receiving element 8 or the amount of light is controlled on the surface of the semiconductor substrate 6 on the side of the optical receptacle 2 to control the emission from the light emitting element 7. An electronic component such as a control circuit for outputting the laser light La is electrically connected to the light-emitting element 7 and the light-receiving element 8 through wiring. The photoelectric conversion device 3 is attached to the optical receptacle 2 by a known fixing means such as an adhesive (for example, a heat/ultraviolet curable resin) disposed between the semiconductor substrate 6 and the optical receptacle 2, thereby The optical receptacle 2 together constitutes the optical module 1.

Further, as shown in FIG. 1, the optical fiber 5 is mounted such that a predetermined length portion on the end face 5a side is attached to a tubular optical fiber formed in the optical receptacle 2 together with a cylindrical ferrule 9 holding the portion. In section 4. In this mounted state, the portion of the optical fiber 5 on the end face 5a side (the portion housed in the optical fiber mounting portion 4) is parallel to the semiconductor substrate 6. In addition, the optical fiber 5 may be any one of a single mode optical fiber and a multi mode optical fiber.

Then, the optical receptacle 2 is optically coupled to the end face 5a of the optical fiber 5 in a state of being disposed between the photoelectric conversion device 3 and the optical fiber 5.

When the optical receptacle 2 is further described in detail, as shown in FIG. 1, the optical receptacle 2 is formed into a substantially rectangular parallelepiped shape except for a main portion having various optical surfaces. That is, as shown in FIGS. 1 and 2, the main portion of the optical receptacle 2 is a horizontal lower end surface 2a as a first surface, a second surface upper end surface 2b, and a third surface right end surface 2c. , left end face 2d, front end face 2e and rear Each face of the end face 2f constitutes a rough outer shape.

Further, the lower end surface 2a and the upper end surface 2b are parallel to each other. Further, the above-described optical fiber mounting portion 4 is formed to extend rightward from the right end surface 2c.

Such a light socket 2 can be integrally formed by, for example, injection molding using a resin material such as polyether imide.

As shown in FIG. 1, the first recessed portion 10 having a substantially rectangular cross section that is recessed upward with respect to the lower end surface 2a is formed on the lower end surface 2a of the optical receptacle 2. The inner bottom surface 10a of the first recess 10 is formed in parallel with the lower end surface 2a. Then, as shown in FIG. 1, a first lens surface 11 is formed on the inner bottom surface 10a of the first recess 10 so as to face (corresponding to) the vicinity of the left end portion of the light-emitting element 7. The first lens surface 11 has a circular shape in a bottom view (FIG. 3), and forms a spherical lens or aspherical convex lens surface that turns the convex surface toward the light-emitting element 7 side. Further, the position of the optical axis OA(1) on the first lens surface 11 is desirably aligned (aligned) with respect to the emission direction of the laser light La with respect to the central portion of the light-emitting element 7. Further, the axial direction of the optical axis OA(1) on the first lens surface 11 may be orthogonal to the inner bottom surface 10a of the first recess 10.

As shown in FIG. 1, the first lens surface 11 is such that the laser light emitted from the light-emitting element 7 is incident from below in a state where the photoelectric conversion device 3 is mounted on the optical receptacle 2. Then, the first lens surface 11 converges (for example, collimates) the incident laser light La and travels toward the inside of the optical receptacle 2 .

Further, as shown in FIG. 1 and FIG. 2, the coupling light total reflection surface 14 and the first portion are disposed at positions facing the upper side of the first lens surface 11 on the upper end surface 2b. The light total reflection surface 15 is monitored. As shown in FIG. 2 and FIG. 4, the coupled light total reflection surface 14 and the first monitor light total reflection surface 15 are arranged so as to be in point contact with each other in the longitudinal direction of FIG. 2 (the vertical direction of the paper surface of FIG. 1) (hereinafter referred to as Parallel configuration).

Further, the direction of the arrangement (contact) corresponds to a direction orthogonal to the internal incident direction of the laser light La and the total reflection directions of the fiber coupling light Lc and the monitor light Lm in the two total reflection surfaces 14 and 15.

As shown in FIG. 2 and FIG. 5, the coupled light total reflection surface 14 and the first monitor light total reflection surface 15 arranged in parallel are in a plan view, and are oriented toward the same plane between the two total reflection surfaces 14 and 15. The only boundary line BL that extends is included, and the optical axis OA(1) on the first lens surface 11 is included on the boundary line BL. Further, as shown in FIG. 4, the coupled light total reflection surface 14 is formed as an inclined plane having an inclination angle of 45 (one of the first inclination angles) toward the counterclockwise direction in FIG. 4 with respect to the lower end surface 2a. However, in FIG. 4, the reference of the inclination angle of the coupling light total reflection surface 14 is taken as an arrow parallel to the lower end surface 2a for the sake of convenience, but of course, the case where the lower end surface 2a is the reference is taken as a reference. The same inclined surface (45°) can also be obtained. Further, as shown in FIG. 4, the first monitor light total reflection surface 15 is formed as an inclined plane having an inclination angle of 38 (one of the second inclination angles) toward the counterclockwise direction in FIG. 4 with respect to the lower end surface 2a. Furthermore, the coupling light total reflection surface 14 and the first monitor light total reflection surface 15 having the same inclination angle are connected to the portion other than the point contact portion by the step surface 145 which is parallel to the optical axis OA(1). connection.

Further, as shown in FIG. 1, the coupled light total reflection surface 14 and the first monitor light total reflection surface 15 are only recessed by the second concave portion 16 which is recessed on the upper end surface 2b. The inner bottom is formed. In addition, in FIG. 2, the coupled light total reflection surface 14 is disposed on the front (front end surface 2e) side, and the first monitor light total reflection surface 15 is disposed on the rear (rear end surface 2f) side, but the front and rear may be reversed. .

Further, as shown in FIG. 1, the inner side surface 16a of the second recessed portion 16 may be formed to ensure a draft of the mold release property in the case where the optical receptacle 2 is resin-molded using a mold (inclined surface). ).

Here, in the coupled light total reflection surface 14, as shown in FIGS. 1 and 5, a part of the laser light La of the light-emitting element 7 passing through the first lens surface 11 is formed (the beam profile shown in FIG. 5) The laser light La of the half portion is internally incident from the lower side in FIG. 1 (the inner side of the optical receptacle 2) at an incident angle larger than the critical angle.

Then, the coupled light total reflection surface 14 is such that a part of the laser light La after the internal incidence is made to be coupled to the fiber coupling light Lc of the end face 5a of the optical fiber 5, and is totally reflected toward the right in FIG. In addition, when Ultem (registered trademark) manufactured by SABIC Co., Ltd. is used as a material for forming the optical receptacle 2, since the refractive index with respect to the wavelength of 850 nm is 1.64, the critical angle in this case is approximately 38°.

On the other hand, as shown in FIG. 1 and FIG. 5, the first monitor light total reflection surface 15 is incident on the coupling light total reflection surface 14 in the laser light La of the light-emitting element 7 that has passed through the first lens surface 11. The laser light La of the other portion other than the incident light (the upper half of the beam profile shown in FIG. 5) is internally formed from the lower side (the inner side of the optical receptacle 2) at an incident angle larger than the critical angle. Incident.

Then, the first monitor light total reflection surface 15 is made to perform the internal incidence. The other part of the laser light La is totally reflected as the monitor light Lm in the state separated from the fiber coupling light Lc toward the lower right side in FIG.

As shown in FIG. 1 and FIG. 2, the second monitor light total reflection is disposed on the upper end surface 2b at a position on the total reflection direction side of the monitor light Lm with respect to the first monitor light total reflection surface 15. Face 17. As shown in FIG. 6, the second monitor light total reflection surface 17 is formed as an inclined plane having an inclination angle of 54 (the third inclination angle is an example) with respect to the lower end surface 2a in the clockwise direction in FIG. As shown in FIG. 1, the second monitor light total reflection surface 17 is composed only of the inner bottom surface of the third recess 18 recessed on the upper end surface 2b so as to be separated from the optical path of the fiber coupling light Lc. Further, in the present embodiment, since the third recessed portion 18 is recessed toward the lower end surface 2a side, as shown in Fig. 1, the second monitor light total reflection surface 17 is positioned in the optical path of the light-coupled light Lc. It is also closer to the lower end face 2a side (below). Further, as shown in FIG. 1, the mold side slope (inclined surface) of the mold release property in the case where the optical receptacle 2 is resin-molded using a mold can be formed on the inner side surface 18a of the third recessed portion 18.

As shown in FIG. 1, the second monitor light total reflection surface 17 is such that the monitor light Lm on the optical path inside the optical receptacle 2 that is totally reflected by the first monitor light total reflection surface 15 is obtained. The upper left side in Fig. 1 is internally incident at an incident angle larger than the critical angle.

Then, the second monitor light total reflection surface 17 is configured such that the monitor light Lm after the internal incidence is totally reflected toward the lower left side which is the light-receiving element 8 side.

Furthermore, as shown in FIG. 1, the right end surface 2c of the main portion of the optical receptacle 2 is formed with the second lens surface 12 facing the end surface 5a of the optical fiber 5. The second The lens surface 12 has a circular shape in the outer peripheral shape, and forms a spherical surface or an aspherical convex lens surface on which the convex surface is turned toward the end surface 5a side of the optical fiber 5. Further, the optical axis OA(2) on the second lens surface 12 is preferably located on the normal line of the central portion of the end face 5a of the optical fiber 5.

As shown in FIG. 1, the second lens surface 12 is such that the fiber coupling light Lc traveling on the optical path inside the optical receptacle 2 after being totally reflected by the coupling light total reflection surface 14 is left from FIG. The square is internally incident.

Then, the second lens surface 12 is emitted toward the end surface 5a of the optical fiber 5 while the fiber coupling light Lc after the internal incidence is converged. Thus, the fiber coupling light Lc can be coupled to the end face 5a of the optical fiber 5.

Further, as shown in FIG. 1 and FIG. 3, a third lens surface is formed at a position on the inner bottom surface 10a of the first recessed portion 10 facing the first lens surface 11 and facing the light receiving element 8 at a position facing the light receiving element 8. 13. As shown in FIG. 1 and FIG. 3, the third lens surface 13 is formed as a spherical surface or an aspherical convex lens surface that is turned toward the light receiving element 8 side, and the light receiving element 8 has an elliptical shape in a bottom view and is received from the light receiving element 8 as shown in FIG. The shape seen on the side is round.

Further, as shown in FIG. 1, the optical axis OA (3) on the third lens surface 13 is inclined with respect to the lower end surface 2a.

As shown in FIG. 1, the monitor light Lm which is totally reflected by the second monitor light total reflection surface 17 is such that the third lens surface 13 is from the upper right side in FIG. 1 (the inner side of the optical receptacle 2). Perform internal incidence. Then, the third lens surface 13 is emitted toward the light receiving element 8 while the monitor light Lm after the internal incidence is converged. In this manner, the monitor light Lm can be coupled to the light receiving element 8.

According to the above configuration, the laser beam La of the light-emitting element 7 incident on the first lens surface 11 can be separated by total reflection of the coupling light total reflection surface 14 and total reflection of the first monitor light total reflection surface 15 Since the fiber-coupled light Lc and the monitor light Lm are formed, the accompanying monitoring of the fiber-coupled light Lc in the direction of the semiconductor substrate 6 in the end face 5a of the optical fiber 5 can be realized only by the surface shape of the optical receptacle 2 and at low cost. Light is sent. In addition, the total reflection direction of the monitor light Lm is set to be the total reflection direction of the monitor light Lm toward the left end surface 2d side with respect to the right end surface 2c side of the first monitor light total reflection surface 15 Since the size of the left and right sides of the socket 2 is suppressed to be small, it is possible to reduce the size and cost of the optical receptacle 2.

Further, according to the above configuration, the second monitor light total reflection surface 17 is disposed closer to the lower end surface 2a than the optical path of the fiber coupling light Lc, whereby the third recess 18 is formed deeper, and the formation of the optical receptacle 2 can be reduced. Since the amount of material used is reduced, it is possible to achieve lower cost.

The configuration based on such a concept can be such that the monitor light Lm is separated from the fiber coupling light Lc in the first monitor light total reflection surface 15, in particular, the first monitor light total reflection surface 15 and the coupled light total reflection. The faces 14 are arranged in parallel and are reasonably implemented in design.

In the above configuration, the first lens surface 11 is included in the boundary line BL (see FIGS. 2 and 5) of the coupled light total reflection surface 14 and the first monitor light total reflection surface 15 as described above. The optical axis OA(1), but the present invention is not limited to such a configuration. For example, the optical axis OA(1) may be shifted to one of the boundary lines BL of the two total reflection surfaces 14 and 15, On the side of the reflection surfaces 14 and 15, the light intensity ratio of the fiber coupling light Lc and the monitor light Lm is different from the above configuration (1:1).

Further, in addition to the above, various modifications as described below may be applied to the present invention.

(First variation)

For example, as shown in FIG. 7 to FIG. 9, the second monitor light total reflection surface 17 may be disposed closer to the upper end surface 2b than the optical path of the fiber coupling light Lc, and in order to secure the second monitor light thus arranged The appropriate total reflection of the monitor light Lm of the reflection surface 17 is such that the inclination angle of the first monitor light total reflection surface 15 and the inclination angle of the second monitor light total reflection surface 17 are different from those in FIGS. 4 and 6 .

Specifically, as shown in FIG. 8, in the present modification, the inclination angle of the first monitor light total reflection surface 15 is set to a value (50°) larger than that in the case of FIG. 4, and as shown in FIG. The inclination angle of the second monitor light total reflection surface 17 is set to a value smaller than that in the case of FIG. 6 (45°).

According to this configuration, since the third recessed portion 18 can be formed shallow and the surface area of the third recessed portion 18 can be suppressed, the mold release property at the time of injection molding of the optical receptacle 2 by using a mold can be improved, and the mechanical strength can be improved.

(2nd variation)

Further, as shown in FIG. 10 to FIG. 13, the first monitor light total reflection surface 15 may be arranged in parallel before the coupling light total reflection surface 14 (the vertical direction of the paper in FIG. 10), and the second monitor light may be used. The total reflection surface 17 is disposed so as to be spaced apart from each other in the front and rear directions so as to correspond to the respective first monitor light total reflection surfaces 15 . 10 is a cross-sectional view taken along line B-B of FIG. 11.

As shown in Fig. 11, in the present modification, the optical path of the fiber coupling light Lc can be secured between the two second monitor light total reflection surfaces 17. Further, as shown in FIG. 10, each of the second monitor light total reflection surfaces 17 is disposed closer to the lower end surface 2a than the optical path of the fiber coupling light Lc. Further, as shown in FIG. 12, the inclination angles of the two first monitor light total reflection surfaces 15 are formed at the same angle (38°), and on the other hand, the inclination angles of the two second monitor light total reflection surfaces 17 are provided. They also form the same angle with each other.

Furthermore, the arrangement positions of the two second monitor light total reflection surfaces 17 are formed in the same position in the lateral direction and the longitudinal direction (height) in FIG.

Further, as shown in Fig. 11, the two first monitor light total reflection surfaces 15 are formed larger than the coupled light total reflection surface 14 in the front and rear (upper and lower in Fig. 11).

According to this configuration, since the total incident light amount incident on the first monitor light total reflection surface 15 can be made larger than the incident light amount incident on the coupling light total reflection surface 14, the amount of light received by the monitor light Lm can be increased.

However, in the present modification, the amount of incident light (i.e., the amount of light of the fiber coupling light Lc) incident on the total reflection surface 14 of the coupling light can be arbitrarily adjusted in accordance with the width (the size of the front and rear) of the total reflection surface 14 of the coupling light. The total incident light amount of the first light total reflection surface 15 (that is, the amount of light of the monitor light Lm) is monitored.

(3rd variation)

As shown in FIG. 14 to FIG. 18, in the second variation, the arrangement positions of the two second monitor light total reflection surfaces 17 may be shifted to the left and right, and in order to correspond to the respective second monitor light total reflection surfaces 17, Two light-receiving elements 8 and a third lens surface 13 are disposed. 14 is a cross-sectional view taken along line C-C of FIG. 15.

As shown in Fig. 17, in the present modification, the inclination angle of the first monitor light total reflection surface 15 on the front side is set to be 41° unlike the second modification (38°). On the other hand, as shown in Fig. 18, the inclination angles of both of the two second monitor light total reflection surfaces 17 are set to 55°.

According to this configuration, the monitoring of the two light receiving elements 8 can be used correspondingly. In this case, for example, the light intensity can be monitored by one of the light receiving elements 8, and the wavelength can be monitored by the other light receiving element 8.

(fourth variation)

In addition, as shown in FIG. 19 and FIG. 20, the second monitor light total reflection surface 17 on the rear side may be disposed closer to the upper end surface 2b than the optical path of the fiber coupling light Lc.

Further, as shown in FIG. 20, in the present modification, the inclination angle of the first monitor light total reflection surface 15 on the rear side is set to be 50° unlike the third modification (41°).

(5th variation)

Furthermore, as shown in FIG. 21 to FIG. 24, the coupled light total reflection surface 14 and the first monitor light total reflection surface 15 may be in line contact in the total reflection direction of the fiber coupling light Lc and the monitor light Lm. Mode configuration (hereinafter, referred to as tandem configuration).

Further, as shown in FIG. 21, in the present modification, the first monitor light total reflection surface 15 is arranged in series on the total reflection direction side (right side) of the fiber coupling light Lc with respect to the coupling light total reflection surface 14.

As shown in FIG. 23, the tilt angle of the coupling light total reflection surface 14 is set to 45° with respect to the lower end surface 2a toward the counterclockwise direction of FIG. 23, and The inclination angle of the first monitor light total reflection surface 15 is set to 50° with respect to the lower end surface 2a toward the counterclockwise direction of FIG. 23 . Further, as shown in FIG. 21, the second monitor light total reflection surface 17 is disposed closer to the upper end surface 2b than the optical path of the fiber coupling light Lc.

According to this configuration, it is possible to easily design the optical path when the third concave portion 18 is formed shallow and the mold release property at the time of injection molding is to be improved. Further, since the coupled light total reflection surface 14 and the first monitor light total reflection surface 15 can be directly connected without being transmitted through the step surface to reduce the surface area, a multiplication effect for improving the mold release property can be expected.

(Sixth variation)

Further, as shown in FIGS. 25 to 28, it is also possible to configure the multi-channel corresponding to the light to be monitored while having the features of the present invention.

That is, in the present modification, the photoelectric conversion device 3 is assumed to have a plurality of (eight) light-emitting elements 7 and light-receiving elements 8 arranged in alignment in the vertical direction of the paper surface in FIG.

Further, in the present modification, the optical fiber 5 is arranged in the same direction as the light-emitting element 7 and the light-receiving element 8 in the same direction, and is arranged in the same number as the light-emitting element 7 and the light-receiving element 8.

In addition, in FIG. 25, each optical fiber 5 is attached to the optical receptacle 2 by the well-known mounting means in the state accommodated in the connector 19 of the multi-core collection type.

Then, according to the configuration of the photoelectric conversion device 3 and the optical fiber 5, the optical receptacle 2 is formed to form an optical path between each of the light-emitting elements 7 and each of the optical fibers 5. And an optical path between each of the light-emitting elements 7 and each of the light-receiving elements 8 to couple the light total reflection surface 14, the first monitor light total reflection surface 15, the second monitor light total reflection surface 17, and the first to third lens surfaces 11 to 13. The same number of light-emitting elements 7, optical fibers 5, and light-receiving elements 8 are disposed at positions corresponding to the light-emitting elements 7, the end faces 5a of the optical fibers 5, and the light-receiving elements 8. In addition, the optical receptacle 2 shown in Fig. 25 corresponds to a cross-sectional view taken along line D-D of Fig. 26.

According to the present variation, the laser light of each of the light-emitting elements 7 can be separated into the fiber-coupling light Lc and the monitor light Lm of each of the light-emitting elements 7 in the coupled light total reflection surface 14 and the first monitor light total reflection surface 15 . Therefore, the multiplexed light transmission accompanying the monitoring can be realized appropriately and at low cost.

The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit and scope of the invention.

For example, in the above-described embodiment, the first monitor light total reflection surface 15 is set to an inclination angle different from that of the coupling light total reflection surface 14, but as shown in FIG. 29, the two total reflection surfaces 14 may be 15 is set to the same inclination angle, and the two total reflection surfaces 14, 15 are formed in the same plane shape.

In this case, the monitor light Lm is totally reflected in the first monitor light total reflection surface 15 in a state of being integrated with the fiber coupling light Lc, and then the light is coupled from the fiber in the second monitor light total reflection surface 17 The state separated by Lc is totally reflected.

According to this configuration, since the shape of the coupled light total reflection surface 14 and the first monitor light total reflection surface 15 can be simplified, it is possible to achieve lower cost.

Further, the present invention can also be applied to an optical transmission body other than the optical fiber 5 such as an optical waveguide.

1‧‧‧Light Module

2‧‧‧Light socket (optical socket body)

2a‧‧‧ Lower end (1st side)

2b‧‧‧Upper end face (2nd side)

2c‧‧‧Right end face (3rd side)

2d‧‧‧left end

3‧‧‧ photoelectric conversion device

4‧‧‧Fiber Optic Installation Department

5‧‧‧Optical fiber (optical transmission body)

5a‧‧‧ end face

6‧‧‧Semiconductor substrate

7‧‧‧Lighting elements

8‧‧‧Light-receiving components

9‧‧‧ ferrules

10‧‧‧1st recess

10a‧‧‧ inside bottom

11‧‧‧1st lens surface

12‧‧‧2nd lens surface

13‧‧‧3rd lens surface

14‧‧‧Coupling light total reflection surface

15‧‧‧1st monitor light total reflection surface

16‧‧‧2nd recess

16a‧‧‧ inside

17‧‧‧2nd monitor light total reflection surface

18‧‧‧3rd recess

18a‧‧‧ inside

145‧‧ ‧ 差

La‧‧‧Laser light

Lc‧‧‧Fiber coupled light

Lm‧‧‧ surveillance light

OA (1), OA (2), OA (3) ‧ ‧ optical axis

Claims (9)

An optical socket capable of optically coupling a light-emitting element and the light-transmitting body in a state of being disposed between a photoelectric conversion device and a light-transmitting body, wherein the photoelectric conversion device is provided with the light-emitting element and the light-receiving device on a substrate The light receiving element receives monitoring light for monitoring light emitted from the light emitting element, wherein the optical receptacle includes a first surface of the optical receptacle body that performs the light from the light emitting component The incident light and the detection light that is directed toward the light receiving element are emitted; and the light-coupling total reflection surface is disposed on the opposite side of the first surface so as to have a predetermined first inclination angle with respect to the first surface. The second surface of the socket body is such that a part of the light of the light-emitting element incident on the first surface is internally incident at an incident angle larger than a critical angle, and the internal light is incident. a part of the light is totally reflected toward the light transmitting body side as coupling light to be coupled to the light transmitting body; the third surface of the optical socket body is performed by The coupling light that is totally reflected by the coupling light total reflection surface is emitted toward the light transmission body; and the first monitor light total reflection surface is adjacent to the coupling light total reflection surface and has a surface opposite to the first surface The predetermined second inclination angle or the first inclination angle is disposed on the second surface such that the light incident on the light-emitting element after the first surface is the same a part of the light other than the part of the light is internally incident at an incident angle larger than the critical angle, and the other part of the light after the internal incidence is separated as the monitoring light from the coupled light or a total reflection toward the third surface side in a state of being integrated with the coupling light; and a second monitor light total reflection surface that is separated from the optical path of the coupling light and has a predetermined third surface with respect to the first surface The tilting angle is arranged such that the monitor light on the second surface is at the position on the total reflection direction side of the first monitor light total reflection surface, and is totally reflected by the first monitor light total reflection surface. The monitor light is internally incident at an incident angle larger than the critical angle, and the monitor light after the internal incidence is totally reflected toward the position of the first light receiving element corresponding to the light receiving element. The optical receptacle according to claim 1, wherein the first monitor light total reflection surface is disposed so as to have the second inclination angle with respect to the first surface, thereby separating the monitor light from the coupling light. In the state of total reflection, the coupled light total reflection surface and the first monitor light total reflection surface are orthogonal to an internal incident direction of the light of the light-emitting element and a total reflection direction of the coupling light and the monitor light. Positioning is performed in a point contact manner or in a line contact manner between the coupling light and the total reflection direction of the monitor light; and the second monitor light total reflection surface is an inner slope of the concave portion recessed on the second surface Composition. The optical receptacle according to claim 2, wherein the coupled light total reflection surface and the first monitor light total reflection surface are disposed to perform the point contact, and the second monitor light total reflection surface is disposed in comparison with The light path of the coupling light is also close to the first surface side. The optical receptacle according to claim 2, wherein the second monitor light total reflection surface is disposed closer to the second surface side than the optical path of the coupling light. The optical receptacle according to any one of claims 2 to 4, wherein the first monitor light total reflection surface and the second monitor light total reflection surface are disposed in plurality. The optical receptacle according to any one of claims 2 to 4, wherein the coupling light total reflection surface and the first monitor light total reflection surface are disposed to perform the line contact; and the first monitor light total reflection surface It is disposed on the total reflection direction side of the coupling light with respect to the coupling light total reflection surface. The optical receptacle according to claim 1, wherein the first monitor light total reflection surface is disposed so as to have the first inclination angle with respect to the first surface, whereby the monitor light is integrated with the coupling light In the state of total reflection, the monitor light is separated from the coupled light in the second monitor light total reflection surface. The optical receptacle according to any one of claims 1 to 7, wherein the position of the light-emitting element corresponding to the first surface is arranged such that The light of the light-emitting element faces the first lens surface on which the coupled light total reflection surface and the first monitor light total reflection surface are incident, and the second lens surface on which the coupling light is emitted toward the light transmission body is disposed on the third surface A third lens surface that emits the monitor light toward the light receiving element is disposed at a position corresponding to the light receiving element on the first surface. An optical module comprising: the optical receptacle according to any one of claims 1 to 8; and the photoelectric conversion device according to claim 1.